I have no issues on win 8.1 I use the Google USB drivers that are with the sdk. The first time, I do have to go into device manager and update the driver. When it asks do you want to locate the driver or pick it from a list select pick from a list. There should be an Android entry if you installed the USB driver. Select that and then select adb interface. You'll also have to do the same for fastboot mode the first time.

I couldn't find a working version of ADB for 8.1 however I installed HTC Sync from the virtual CD and that installed all the drivers. Uninstalled sync manager cos I don't use it and the drivers remain and work fine.

I have no issues on win 8.1 I use the Google USB drivers that are with the sdk. The first time, I do have to go into device manager and update the driver. When it asks do you want to locate the driver or pick it from a list select pick from a list. There should be an Android entry if you installed the USB driver. Select that and then select adb interface. You'll also have to do the same for fastboot mode the first time.

Sent from my HTC One_M8 using Tapatalk

check your usb 3 controller. Is it intel 3.0 usb controller. if you see intel xtensible controller in device manager this could be the issue, it can break adb on all ports. here is a link to a fix for this usb problem i can confirm it works as i have had this issue myself. Hope this helps

Had the same issue when trying to achieve root. Booted Windows to advanced start up and disabled the driver enforcement and everything just went smooth from there. Drivers installed just fine and everything just worked.

I cant get adb drivers to work with 8.1. I've tried every driver in the book. Followed a few guides , erased drivers , reinstalled , even at one point tried reinstalling windows , different USB port, different cable . now I am no means a novice , but is there something simple I'm missing ? Any help appreciated

Sent from my HTC One_M8 using xda app-developers app

search for all-in-one-toolkit for the M8. it has links to installing drivers, u can use that toolkit to flash RUU, kernel, recovery, unlock bootloader and even run commands.

Had the same issue when trying to achieve root. Booted Windows to advanced start up and disabled the driver enforcement and everything just went smooth from there. Drivers installed just fine and everything just worked.

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